EventObject.preventDefault doesn't work in IE8?

[dbassett74]

Seems like in IE8, the e.preventDefault() line in the below code has no affect:

keydown: function(cbo, e) {
    var c = e.getCharCode();
    if (c == e.TAB) {
        if (Ext.isEmpty(pnl.getComponent("AgencyCombo").getValue())) {
            e.preventDefault();
            pnl.getComponent("AgencyCombo").focus(true, 100);
        }
    }
}

Seems to work just fine in IE6, FF3, Chrome, Safari and Opera. Is this a known issue and are there any work arounds?

[nebaff]

i'm trying to override ctrl+s

works in google docs, so possible with IE8